"Therefore know that the LORD your God, He is God, the faithful God who keeps covenant and mercy for a thousand generations with those who love Him and keep His commandments;
Deuteronomy 7:9
Surrounding context
7:8 but because the LORD loves you, and because He would keep the oath which He swore to your fathers, the LORD has brought you out with a mighty hand, and redeemed you from the house of bondage, from the hand of Pharaoh king of Egypt.
7:9 "Therefore know that the LORD your God, He is God, the faithful God who keeps covenant and mercy for a thousand generations with those who love Him and keep His commandments;
7:10 and He repays those who hate Him to their face, to destroy them. He will not be slack with him who hates Him; He will repay him to his face.